diff --git a/.makefile b/.makefile
index d7ad0a6..4514a2a 160000
--- a/.makefile
+++ b/.makefile
@@ -1 +1 @@
-Subproject commit d7ad0a6e0c6ac1af798264c4198abc0c60c31f4e
+Subproject commit 4514a2aedb02e1c297bfc02962861a104c9b3013
diff --git a/external/compile-external-libs.sh b/external/compile-external-libs.sh
index ba82eb9..65d33a7 100755
--- a/external/compile-external-libs.sh
+++ b/external/compile-external-libs.sh
@@ -1,5 +1,4 @@
-#!/bin/bash -ex
-
+#!/bin/bash -e
 ###############################################################################
 ### This script is called by (cd .. && make compile-external-libs). It will
 ### compile thirdparts cloned previously with make download-external-libs.
@@ -22,29 +21,7 @@
 ### find them when you'll start your application.
 ###############################################################################
 
-### $1 is given by ../Makefile and refers to the current architecture.
-if [ "$1" == "" ]; then
-  echo "Expected one argument. Select the architecture: Linux, Darwin or Windows"
-  exit 1
-fi
-
-ARCHI="$1"
-TARGET="$2"
-CC="$3"
-CXX="$4"
-
-function print-compile
-{
-    echo -e "\033[35m*** Compiling:\033[00m \033[36m$TARGET\033[00m <= \033[33m$1\033[00m"
-}
-
-### Number of CPU cores
-NPROC=-j1
-if [[ "$ARCHI" == "Darwin" ]]; then
-    NPROC=-j`sysctl -n hw.logicalcpu`
-elif [[ "$ARCHI" == "Linux" ]]; then
-    NPROC=-j`nproc --all`
-fi
+source ../.makefile/compile-external-libs.sh
 
 ### Library zlib-ng
 print-compile zlib-ng
@@ -52,8 +29,8 @@ if [ -e zlib-ng ];
 then
     mkdir -p zlib-ng/build
     (cd zlib-ng/build
-     cmake -GNinja -DZLIB_COMPAT=ON -DZLIB_ENABLE_TESTS=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON ..
-     VERBOSE=1 ninja $NPROC
+     call-cmake -DZLIB_COMPAT=ON -DZLIB_ENABLE_TESTS=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON ..
+     call-make
     )
 else
     echo "Failed compiling external/zipper: directory does not exist"
@@ -65,8 +42,8 @@ if [ -e minizip ];
 then
     mkdir -p minizip/build
     (cd minizip/build
-     cmake -GNinja -DUSE_AES=ON ..
-     VERBOSE=1 ninja $NPROC
+     call-cmake -DUSE_AES=ON ..
+     call-make
     )
 else
     echo "Failed compiling external/zipper: directory does not exist"
diff --git a/external/download-external-libs.sh b/external/download-external-libs.sh
index 2823361..bb2c168 100755
--- a/external/download-external-libs.sh
+++ b/external/download-external-libs.sh
@@ -1,33 +1,17 @@
-#!/bin/bash
+#!/bin/bash -e
+###############################################################################
+### This script is called by (cd .. && make download-external-libs). It will
+### git clone thirdparts needed for this project but does not compile them.
+### It replaces git submodules that I dislike.
+###############################################################################
 
-### This script will git clone some libraries that Zipper needs and
-### compile them. To avoid pollution, they are not installed into your
-### environement. Therefore Zipper Makefiles have to know where to
-### find their files (includes and static/shared libraries).
-
-### $1 is given by ../Makefile and refers to the current architecture.
-if [ "$1" == "" ]; then
-  echo "Expected one argument. Select the architecture: Linux, Darwin or Windows"
-  exit 1
-fi
-ARCHI="$1"
-TARGET=Zipper
-
-### Delete all previous directories to be sure to have and compile
-### fresh code source.
-rm -fr backward-cpp zlib-ng minizip 2> /dev/null
-
-function clone
-{
-    NAME=`echo "$1" | cut -d"/" -f2`
-    echo -e "\033[35m*** Cloning:\033[00m \033[36m$TARGET\033[00m <= \033[33m$NAME\033[00m"
-    git clone --recursive https://github.com/$1.git --depth=1 #> /dev/null 2> /dev/null
-}
+source ../.makefile/download-external-libs.sh
 
 ### zlib replacement with optimizations for "next generation" systems.
 ### License: zlib
-clone zlib-ng/zlib-ng
+cloning zlib-ng/zlib-ng
 
-### Minizip contrib in zlib with latest bug fixes that supports PKWARE disk spanning, AES encryption, and IO buffering
+### Minizip contrib in zlib with latest bug fixes that supports PKWARE disk
+### spanning, AES encryption, and IO buffering.
 ### License: zlib
-clone Lecrapouille/minizip
+cloning Lecrapouille/minizip